From Greek: para allelois beside one another. Lines are parallel if they lie in the same plane, and are the same distance apart over their entire length. Try this Drag any orange dot at the points P or Q. As the line PQ moves, the line RS will remain parallel to it. Parallel lines remain the same distance apart over their entire length.
It is important to know whether the cancer has got into the lymph glands because they are one of the main mechanisms by which the cancer can spread to other parts of the body. As long as the spread is just to the lymph glands near to the colon then this would indicate Stage 3 cancer.
When cancer spreads to lymph nodes, the cancer cells in the nodes will look like cells from the primary tumour when theyâre examined under the microscope. For example, when a lung cancer | has spread to the lymph nodes, the cells in the lymph nodes look like lung cancer cells. This affects the way they are treated.owever, if there are only a small number of cancer cells in the lymph nodes, they may feel normal. It's only possible to tell whether a cancer is present by removing part or all of the lymph node and examining the cells in a laboratory.